diff --git a/roles/iohk.nix b/roles/iohk.nix
index 7dd2360..1914126 100644
--- a/roles/iohk.nix
+++ b/roles/iohk.nix
@@ -4,6 +4,12 @@
 
 {
 
+  nix = {
+    extraOptions = ''
+      repeat = 1   # Ensure reproducibility of builds
+    '';
+  };
+
   nix.binaryCaches = [
     "https://cache.nixos.org"
     "https://hydra.iohk.io"